Lug chuck for rock drills



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` C. c. HANSEN LUG' CHUCK FOR ROCK DRILLS v Filed May 5, 1922 'ventionin one of Figure l is a longitudinal sectional eleval Patented Apr. l0,1923.

STATES PATENT OFFICE.

CHARLES C. HANSEN, OF EASTON,

COMPANY, 0F JERSEY CITY, NEW JERSEY,

ACORPORATION OF NEW JERSEY.

`LUG CHUCK. FOR ROCK DRILLS.

Application filed May 5, 1922. Serial No. 558,689.

To all whomr 'it may concern.'

Be it known that l, CHARLES C. HANSEN, a citizen of the United States,and a resident of Easton, in the county`of Northampton and State vofPennsylvania, have invented a certain Lug Chuck of which the followingis a specification, accompanied by drawing.'

This invention relates rock drills of the hammer type, but' moreparticularly to a lug chuck for such machines adapted to`receive lugsteel and. impart rotation thereto. A

The objects of the invention are to simplify and strengthen the-chuck,enable the parts of the chuck vto be readily assembled in the machineand disassembled, and pro duce ,a construction in which .wear anbreakage are reduced to a minimum.

My improved lug chuck is capable of use with any form of` automaticrotation, in which a chuck sleeve is rotated` for imparting rotation to.a drill steel having lugs which engage a -driver, but in the presentinstance, I have chosen to show a chuck having a gear adapted to berotated by means of any suitable independent rotation motor.

.In the drawings, which illustrate the inits preferred forms,

to fluid actuated tion partly broken away of the front end of a rockdrill embodying the invention.

Figure 2 is a perspective view of the driver,

Figure 3 is broken and partly in the chuck sleeve,

Figure 4 is a transverse the line 4-4 of Figure 1, rection of thearrows, an

Figure 5 is a transverse the line 5-5 of Figure 1, rection of thearrows.

Referring to the drawings, the cylinder A'of a rock drill is indicatedhaving the front cylinder washer B through which the hammer piston Creciprocates and imparts blows of impact to the shank D of the drillsteel E having the lugs F. The machine is provided with a front head Gcontaining the chuck parts which include the chuck sleeve H ada ted tobe rotated as by means of the gear J1? and the driver K with the lugs Fon the steel engage.

a perspective view partly sectional view on looking in the disectionalview lon looking in the di- The chuck bushing L is inserted within forRock Drills,-

d the lugs F longitudinal section of which' the forward end of the chucksleeve H and in this instance, the chuck bushing is preferablyconstructed with a shoulder O intermediate its length, adapted to bearVagainst an internal shoulder P in the bore of the chuck sleeve H, toresist the rearward thrust and impact ofthe lugs F of the drill steelupon the bushing. f

In accordance with my invention, both the chuck sleeve H and the chuckbushing L are formed with registering clutch jaws Q and R respectively,and the driver K is formed with clutch jaws S cooperating with saidclutch jaws Q and R. The driver K isalso provided with internal lugs T,preferably formed in alignment with and as a part of said driver clutch'aws S with which of the dri l steel cooperate. The lugs T engave thelugs F on the steel and lock the Steef in driving postion,`since thesteel cannot be withdrawn withoutrotating it backwards through the arcof a circle 1n order to bringthe lugs F past the shoulder V' andopposite the slots W, cut vin the shoulders. flhe forward end U of thechuck bushing L is preferably beveled, to receive the beveled surface ofthe lugs F of the drill steel.

I claim:

.lqgA lug chuck for fluid actuated rock drills of he hammer type,comprising a chuck sleevel adapted to be rotated, a removablecylindrical chuck bushing within the forward end of said sleeve seatedagainst an internal integral shoulderon said sleeve, through which theshank of the drill steel is adapted to extend in osition to receive theimpact blows of thelii the machine, clutch 'aws formed in both the chucksleeve and t e chuck bushing-fand a. driver having clutch the clutchjaws in both chuck bushing.

2. A lum' chuck for fluid actuated rock drills of lthe hammer type,comprising a chuck sleeve adapted to be rotated, movable cylindricalchuck bushin within the forward end of said sleeve seate against aninternal integral shoulder on said sleeve, throughl which the shank ofthe drilllsteel is adapted to extend in position to receive the impactblows of the hammer istons of thel machine, clutch jaws forme in boththe chuck sleeve and the chuck bushing, and ,a driver having clutch-jaws cooperating with jaws cooperating withthe chuck sleeve and ammerpiston of the dutch jaws in both the chuck Seeve and cimeli bushing, andals@ picvided with irielimi ings io'med in alignment. with and as a partof 'the said drivelchitch jaws.

5. A. lug chuck for Huid actuated roei; driiis of' the hammer typetcomprising a chuck slew@ adapted to be rotated, a remcvzbie cyindlicachuck bushing Within til-3 forwii'd and of said sieeve seated against:u1 internal integrati shoulder on said Sleeve, thisugh'wiiich the Shankof time drill steel is adapted i@ afiibenl in psition to receive theimpact biows of be hummer piscm of the machinea clutch jaws formed inioh the chuvk sleeve ami iii/e cimeli busi ing, and :i driver 11:1 vingdutch jaws wapen?. u' witg 'the clutch jaws in both the chuck sleeve.an@ chuck bushing, said driver having ineinai ings adapted 0 engage thelugs on the seei und iock the Steel in driving position.

in testimony whereof l have signed iiis specification.

CHARLES HANSEN.

